Turbine water-wheel



(No Modem" J. P. PRIZELL.

. TURBINE WATER WHEEL. .No .334,523. Patented Jan. 19, 1886.

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k v y W UNITED STATES PATENT OFFICE.

JOSEPH P. FRIZELL, OF BOSTON, MASSACHUSETTS.

TURBINE WATER-WHEEL.

SPECIFICATION forming part of Letters Patent No. 334,523, dated January 19, 1886.

Application filed April 8, 1885.

To all whom it may concern.-

Be it known that I, J OSEPH P. FRIZELL, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Turbine Water-Wheels, of which the following is a specification.

My invention relates to the prevention of waste of water between the revolving and fixed parts of the wheel.

Figure 1 is a plan of the device; Fig. 2, a section onthe line A F of Fig. 1.

It is well known that the turbine waterwheel revolves inside or outside of a fixed curb or case. A certain space, commonly called clearance, necessarily exists between the revolving and fixed parts, in order to prevent binding and allow for unavoidable imperfections of workmanship and derangement of the center from wear and other causes. Water escapes through this space without acting on the wheel, and the object of this invention is to prevent or greatly diminish-this waste. This object I attain in the following manner:

In Fig. 1, let A represent the revolving, and B the fixed, part of the wheel; or, vice versa, A may represent the fixed, and B the revolving, part, D being the annular space or clearance between them. A ring, 0, is fitted to A as closely as possible without binding, resting on B. The bearing-surface of the ring is planed, as is also the surface of B so far as it can be occupied by the ring, so that no water can escape between B and O. The pressure of Serial No. 161,614. (No model.)

the water is supposed to hold 0 on its seat. For the case in which the pressure acts upward, four or more clamps, E, are applied, as shown, to prevent G from dropping ofi its seat when the pressure of water is withdrawn. The clamps would also be applied in the case of a wheel running on a horizontal axis.

With the above-described device any movement of the center of A simply shifts the position of the ring on its seat, so that the wheel may be operated with a much narrower space between A and C than would be admissible between A- and B, and the waste of water through the clearance-space correspondingly diminished.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. The ring 0, covering the space D between the fixed and revolving parts A and B of the wheel without being rigidly attached to either of these parts, being held upon its seat by the pressure of the water and free to move, so as 

